January Jones, wearing Prabal Gurung, attends the AMC celebration of the final 7 episodes of ‘Mad Men’ with the Black & Red Ball at the Dorothy Chandler Pavilion on March 25, 2015 in Los Angeles, California.(Photo by JB Lacroix/WireImage)

Christina Hendricks, wearing Zac Posen, attends the AMC celebration of the final 7 episodes of ‘Mad Men’ with the Black &amp; Red Ball at the Dorothy Chandler Pavilion on March 25, 2015 in Los Angeles, California.(Photo by JB Lacroix/WireImage)

Christina Hendricks attends the AMC celebration of the final 7 episodes of 'Mad Men' with the Black &amp; Red Ball at the Dorothy Chandler Pavilion on March 25, 2015 in Los Angeles, California.(Photo by JB Lacroix/WireImage)

Kiernan Shipka, wearing Miu Miu, attends the AMC celebration of the final 7 episodes of ‘Mad Men’ with the Black &amp; Red Ball at the Dorothy Chandler Pavilion on March 25, 2015 in Los Angeles, California.(Photo by JB Lacroix/WireImage)